Power supply



FIG. 1 is a top, front, left side perspective view of a power supply showing our new design;

FIG. 2 is a top, rear, right side perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a left view thereof;

FIG. 6 is a right view thereof;

FIG. 7 is a top view thereof;

FIG. 8 is a bottom view thereof;

FIG. 9 is a partially enlarged view of FIG. 1;

FIG. 10 is another partially enlarged view of FIG. 1;

FIG. 11 is a partially enlarged view of FIG. 6; and,

FIG. 12 is another partially enlarged view of FIG. 6.

The broken lines shown in the figures depict portions of the power supply that form no part of the claimed design. 

CLAIM The ornamental design for a power supply, as shown and described. 